The influence of oxygen concentration on biomass gas micro gas turbine oxygen-enriched combustion

This paper carries out a numerical research on the distributions of temperature field and component field in the combustion chamber of the design 30 KW micro gas turbine combustion chamber under 4 different O₂/CO₂ atmosphere combustion conditions. The micro gas turbine use biomass gas as fuel and the oxygen concentration is respectively Φ (O₂ = 21%, 30%, 35%, 40%). The following conclusions can be drawn from the simulation results: with the initial oxygen concentration increasing, the temperature in the combustion chamber rises gradually and the combustion area is more concentrated. Besides, the uneven coefficient of combustion chamber outlet temperature decreases. With the increase of the initial oxygen concentration, the combustion chamber outlet CO and CO₂ average concentration both correspondingly decrease and the combustion chamber outlet CO₂ average concentration are all above 70% under all the combustion conditions.